Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1983-10-05
1985-10-22
Taylor, Billy S.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
57 17, 156425, 242 721, H01F 4108, B65H 8102
Patent
active
045483647
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a winding machine for the winding of elongate members or cores, preferably endless cores, comprising an exchangeable and openable, substantially annular wire magazine having a slit for drawing out winding wire on its side facing the axis of revolution, and a machine frame provided with guide means and driving means for rotational movement of the wire magazine around said member or core, whereby winding wire is supplied to the wire magazine in the same operation as winding wire is drawn out through said slit.
BACKGROUND ART
For the winding of elongate members or cores for use in wire wound resistors, coils and transformers in electrical or electronic equipment, winding machines are known which with respect to their function can be divided in a number of principal types, such as disclosed in the specification of applicants' international patent application PCT/DK79/00008, international publication No. WO79/00763.
For the winding of closed members, winding machines of the so-called single-ring type are normally used in case of smaller wire dimensions, and winding machines of the so-called double-ring type in case of greater wire dimensions. Machines of the single-ring type are superior with respect to the winding speed, whereas the requirements to accurate positioning of the winding wire on the core which arises, for example, in case of controllable resistors or transformers are fulfilled to a greater extent by winding machines of the double-ring type.
From U.S. Pat. No. 2,974,890 a winding machine of the single-ring type is known operating in accordance with an immediate or direct winding procedure, which means that winding wire is supplied to a wire magazine in the machine in the same operation in which wire is drawn out from the rotating wire magazine for winding of the core. In this prior art machine, the wire magazine comprises two rings of circular cross-section which are kept in mutual engagement with a common axis of revolution by three pulley-shaped rollers, one of which is pressed against the magazine with an adjustable contact pressure so as to maintain the wire tension during the drawing of the wire between the rings within desirable limits. However, this prior art machine has not found any application in practice, mainly due to the following disadvantages.
In order to enable a selective wire-drawing, the wire diameter must be great relative to the cross-sectional diameter of the two magazine rings, whereby, in addition to a limited applicability with respect to wire dimensions, inferior residual hole conditions in the winding of endless members will result.
The winding object must be centrally positioned with respect to the wire magazine, since an excentrical location will result in an acute drawing angle, whereby the wire tension will be mainly tangential relative to the magazine with the resulting risk of slipping of the wire in the drawing slit between the two rings. Also this requirement results in inferior residual hole conditions in the winding of endless members.
Moreover, since the prior art winding machine described does not comprise any holding means for the wire supply left in the wire magazine between the two rings after cutting of the winding wire, so that the supply of wire into the magazine must be continued right to the end of the winding operation, a return coiling of the wire surplus in the magazine must be performed after each wire operation, if a great overconsumption of winding wire should be avoided.
In addition, it is common to the prior art winding machines that they can only be used together with a specific type of wire magazine, since accurate matching is required between the wire magazine and the magazine holder of the winding machine with guide means for the wire magazine, so that it is not possible with one and the same winding machine to comply with the different requirements as to the design of the wire magazine which are made in different winding operations in dependence, inter alia, of the wire dimension and the
REFERENCES:
patent: 2974890 (1951-03-01), Davis
patent: 3400894 (1968-09-01), McIntosh et al.
patent: 3669365 (1972-06-01), Loturco
patent: 3848819 (1974-11-01), Fukushima
patent: 3982705 (1976-09-01), Peck et al.
patent: 4079895 (1978-03-01), deFenffe
Jan B. Pedersen, International Publication WO79/00763, Pub. Oct. 4, 1979.
Koch Robert J.
Taylor Billy S.
Tortrix A/S
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